1. In a small bowl, mix bouillon granules, chopped parsley, and poultry seasoning; set aside.
2. Layer in a slow cooker, in order. Canadian bacon, carrots, celery and onion.
3. Add water. Remove skin, if desired, and excess fat from chicken; rinse and pat dry.
4. Place meat in slow cooker. Sprinkle with half of the reserved seasoning mixture.
5. Top with remaining chicken and sprinkle with remaining seasoning mixture.
6. Stir soup and flour together; spoon over top. DO NOT STIR.
7. Cover and cook on high for 3 to 3 1/2 hours or on low for 6-8 hours.